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https://www.readbyqxmd.com/read/28646742/image-analysis-for-tsh-mrna-in-situ-hybridization-in-pituitary-glands-from-rats-with-thyroid-follicular-cell-hypertrophy-after-treatment-with-three-different-test-compounds
#1
Juergen Funk, Martin Ebeling, Thomas Singer, Christian Landes
The goal of this in situ hybridization and image analysis technique is to study the effects of new pharmacological/chemical entities on the thyroid and pituitary gland in rats, reveal the pathogenesis of thyroid follicular cell hypertrophy and to retrospectively exclude the risk of thyroid tumor development in humans. In the present study, we describe the increase of thyroid-stimulating hormone- (TSH-) beta subunit mRNA in the pars distalis of the pituitary gland and the quantitative measurement of TSH mRNA positive cells from rats of three 4-week toxicity studies treated with three different test compounds inducing thyroid follicular cell and hepatocellular hypertrophy in rats...
June 11, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28646302/t-regulatory-cells-exhibit-a-biphasic-response-to-prolonged-endurance-exercise-in-humans
#2
Tom Clifford, Matthew J Wood, Philip Stocks, Glyn Howatson, Emma J Stevenson, Catharien M U Hilkens
PURPOSE: T-regulatory cells (Tregs) are a sub-population of lymphocytes that act to suppress aberrant immune responses. We investigated changes in the numbers of naïve and terminally differentiated Tregs in the peripheral blood to establish their role in the immuno-suppressive response to prolonged exercise. METHODS: Blood was drawn from seventeen experienced runners (age 40 ± 12 years; height 1.75 ± 0.08 m; mass 71.4 ± 10.8 kg) before, ~1 h after (POST-1h), and on the day following the marathon (POST-1d)...
June 23, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28645294/3-5-4-trihydroxy-6-7-3-trimethoxyflavone-protects-against-beta-amyloid-induced-neurotoxicity-through-antioxidative-activity-and-interference-with-cell-signaling
#3
Alona Telerman, Rivka Ofir, Yoel Kashman, Anat Elmann
BACKGROUND: Alzheimer's disease is a neurodegenerative disease, characterized by progressive decline in memory and cognitive functions, that results from loss of neurons in the brain. Amyloid beta (Aβ) protein and oxidative stress are major contributors to Alzheimer's disease, therefore, protecting neuronal cells against Aβ-induced toxicity and oxidative stress might form an effective approach for treatment of this disease. 3,5,4'-trihydroxy-6,7,3'-trimethoxyflavone (TTF) is a flavonoid we have purified from the plant Achillea fragrantissima; and the present study examined, for the first time, the effects of this compound on Aβ-toxicity to neuronal cells...
June 23, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28644609/galnac-tyrosine-is-a-ligand-of-plant-lectins-antibodies-and-human-and-murine-macrophage-galactose-type-lectins
#4
Ruslan Gibadullin, David Wayne Farnsworth, Joseph J Barchi, Jeffrey C Gildersleeve
In 2011, a new type of protein O-glycosylation was discovered in which N-acetylgalactosamine is attached to the side chain of tyrosine (GalNAc-Tyr). While present on dozens of proteins, the biological roles of GalNAc-Tyr are unknown. To gain insight into this new type of modification, we synthesized a group of GalNAc-Tyr glycopeptides, constructed microarrays, and evaluated potential recognition of GalNAc-Tyr by a series of glycan-binding proteins. Through a series of >150 microarray experiments, we assessed binding properties of a variety of plant lectins, monoclonal antibodies, and endogenous lectins...
June 23, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28643774/insufficient-antibody-validation-challenges-oestrogen-receptor-beta-research
#5
Sandra Andersson, Mårten Sundberg, Nusa Pristovsek, Ahmed Ibrahim, Philip Jonsson, Borbala Katona, Carl-Magnus Clausson, Agata Zieba, Margareta Ramström, Ola Söderberg, Cecilia Williams, Anna Asplund
The discovery of oestrogen receptor β (ERβ/ESR2) was a landmark discovery. Its reported expression and homology with breast cancer pharmacological target ERα (ESR1) raised hopes for improved endocrine therapies. After 20 years of intense research, this has not materialized. We here perform a rigorous validation of 13 anti-ERβ antibodies, using well-characterized controls and a panel of validation methods. We conclude that only one antibody, the rarely used monoclonal PPZ0506, specifically targets ERβ in immunohistochemistry...
June 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28643460/periodic-limb-movement-in-sleep-and-sickle-cell-disease-a-neglected-association
#6
Ana C Cabañas-Pedro, Suely Roizenblatt, Altay A L de Souza, Sérgio Tufik, Maria S Figueiredo
High frequency of periodic limb movements in sleep (PLMS) has been described among children with sickle cell disease (SCD), but there is little information about PLMS among adults with SCD. We aim to determine the frequency of PLMS among adults with SCD and to identify possible associations with iron status and haemolytic parameters. We analysed polysomnography on 99 adults: 74 with sickle cell anaemia (HbSS), 19 with HbSC (double heterozygosis HbS and HbC) and 6 with HbS-beta thalassaemia. Laboratory data were collected close to the time of the polysomnography examination...
June 23, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28642969/diverse-metabolic-effects-of-o-glcnacylation-in-the-pancreas-but-limited-effects-in-insulin-sensitive-organs-in-mice
#7
Shogo Ida, Katsutaro Morino, Osamu Sekine, Natsuko Ohashi, Shinji Kume, Tokuhiro Chano, Kanako Iwasaki, Norio Harada, Nobuya Inagaki, Satoshi Ugi, Hiroshi Maegawa
AIMS/HYPOTHESIS: O-GlcNAcylation is characterised by the addition of N-acetylglucosamine to various proteins by O-GlcNAc transferase (OGT) and serves in sensing intracellular nutrients by modulating various cellular processes. Although it has been speculated that O-GlcNAcylation is associated with glucose metabolism, its exact role in whole body glucose metabolism has not been fully elucidated. Here, we investigated whether loss of O-GlcNAcylation globally and in specific organs affected glucose metabolism in mammals under physiological conditions...
June 22, 2017: Diabetologia
https://www.readbyqxmd.com/read/28642958/phosphorylation-of-a-full-length-amyloid-%C3%AE-peptide-modulates-its-amyloid-aggregation-cell-binding-and-neurotoxic-properties
#8
Elaheh Jamasbi, Frances Separovic, Mohammed Akhter Hossain, Giuseppe Donato Ciccotosto
Amyloid beta peptide (Aβ) is the major protein component of the amyloid plaques that are present in the brains of Alzheimer's disease (AD) patients. Aβ42 peptide is a known neurotoxic agent that binds to neurons and, under specific aggregation conditions, triggers cell death. Aβ peptide can undergo specific amino acid posttranslational modifications, such as phosphorylation, that are important for modulating its proteolytic degradation, aggregation, binding to lipid membranes and neurotoxic functions. Peptides phosphorylated at serine 8 in full-length Aβ42 (pAβ42) were synthesised and compared to native Aβ42 peptide...
June 23, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28642549/focal-adhesion-kinase-regulates-hepatic-stellate-cell-activation-and-liver-fibrosis
#9
Xue-Ke Zhao, Lei Yu, Ming-Liang Cheng, Pulin Che, Yin-Ying Lu, Quan Zhang, Mao Mu, Hong Li, Li-Li Zhu, Juan-Juan Zhu, Meng Hu, Po Li, Yue-Dong Liang, Xin-Hua Luo, Yi-Ju Cheng, Zhi-Xiang Xu, Qiang Ding
Understanding the underlying molecular mechanisms of liver fibrosis is important to develop effective therapy. Herein, we show that focal-adhesion-kinse (FAK) plays a key role in promoting hepatic stellate cells (HSCs) activation in vitro and liver fibrosis progression in vivo. FAK activation is associated with increased expression of α-smooth muscle actin (α-SMA) and collagen in fibrotic live tissues. Transforming growth factor beta-1 (TGF-β1) induces FAK activation in a time and dose dependent manner. FAK activation precedes the α-SMA expression in HSCs...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642261/transforming-growth-factor-beta-stimulates-smad1-5-signaling-in-pulmonary-artery-smooth-muscle-cells-and-fibroblasts-of-the-newborn-mouse-through-alk1
#10
Huili Zhang, Lili Du, Ying Zhong, Kathleen C Flanders, Jesse D Roberts
The intracellular signaling mechanisms through which TGFβ regulates pulmonary development are incompletely understood. Canonical TGFβ signaling involves Smad2/3 phosphorylation, Smad2/3·Smad4 complex formation and nuclear localization, and gene regulation. Here we show that physiologically relevant TGFβ1 levels also stimulate Smad1/5 phosphorylation, typically a mediator of bone morphogenetic protein (BMP) signaling, in mouse pup pulmonary artery smooth muscle cells (mPASMC) and lung fibroblasts and other interstitial lung cell lines...
June 22, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28642153/characterization-of-the-differential-coregulator-binding-signatures-of-the-retinoic-acid-receptor-subtypes-upon-ant-agonist-action
#11
Ignacio Miro Estruch, Diana Melchers, René Houtman, Laura H J de Haan, John P Groten, Jochem Louisse, Ivonne M C M Rietjens
Retinoic Acid Receptor alpha (RARα/NR1B1), Retinoic Acid Receptor beta (RARβ/NR1B2) and Retinoic Acid Receptor gamma (RARγ/NR1B3) are transcription factors regulating gene expression in response to retinoids. Within the RAR genomic pathways, binding of RARs to coregulators is a key intermediate regulatory phase. However, ligand-dependent interactions between the wide variety of coregulators that may be present in a cell and the different RAR subtypes are largely unknown. The aim of this study is to characterize the coregulator binding profiles of RARs in the presence of the pan-agonist all-trans-Retinoic Acid (AtRA); the subtype-selective agonists Am80 (RARα), CD2314 (RARβ) and BMS961 (RARγ); and the antagonist Ro415253...
June 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28642128/immunomodulation-of-parkinson-s-disease-using-mucuna-pruriens-mp
#12
REVIEW
Sachchida Nand Rai, Hareram Birla, Walia Zahra, Saumitra Sen Singh, Surya Pratap Singh
Immune control is associated with nigrostriatal neuroprotection for Parkinson's disease (PD); though its direct cause and effect relationships have not yet been realized and modulating the immune system for therapeutic gain has been openly discussed. While the pathobiology of PD remains in study, neuroinflammation is thought to speed nigrostriatal degeneration. The neuroinflammatory cascade associated with PD begins with aggregation of misfolded or post-translationally modified α-synuclein (α-syn). Such aggregation results in neuronal cell death and the presence of chronically activated glia (microglia and astroglia), leading to the production of proinflammatory cytokines like tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β), IL-6, and enzymes such as nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and cyclooxygenase-2 (COX-2)...
June 19, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28641522/advances-on-ppar%C3%AE-research-in-the-emerging-era-of-precision-medicine
#13
Pinyi Lu, Zhongming Zhao
BACKGROUND: Peroxisome proliferator-activated receptor gamma (PPARγ) is a member of the nuclear receptor superfamily that functions as a ligand-inducible transcription factor. It regulates glucose and lipid metabolism, immunity, and cellular growth and differentiation. Thiazolidinediones (TZDs) are potent insulin sensitizers that function by activating PPARs, with a high specificity for PPARγ. Due to their ability to preserve pancreatic beta cell function and reduce insulin resistance, TZDs have become one of the most prescribed classes of medications for type 2 diabetes (T2D) since their approval by the US Food and Drug Administration (FDA) and initial use in 1997...
June 21, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28641457/antiglioma-pseurotin-a-from-marine-bacillus-sp-fs8d-regulating-tumour-metabolic-enzymes
#14
Komal Anjum, Hongyun Bi, Weiyun Chai, Xiao-Yuan Lian, Zhizhen Zhang
Pseurotin A was isolated from a culture of marine Bacillus sp. FS8D and showed to be active against the proliferation of four different glioma cells with IC50 values of 0.51-29.3 μM. It has been found that pseurotin A downregulated the expression of tumour glycolytic enzymes pyruvate kinase M2 (PKM2) and lactate dehydrogenase 5 (LDH5) and upregulated the expression of pyruvate dehydrogenase beta (PDHB), adenosine triphosphate synthase beta (ATPB) and cytochrome C (Cyto-C), the important regulators for tricarboxylic acid cycle and oxidative phosphorylation...
June 23, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28640877/identification-of-c-ebp%C3%AE-as-a-novel-target-of-the-hpv8-e6-protein-regulating-mir-203-in-human-keratinocytes
#15
Anna M Marthaler, Marta Podgorska, Pascal Feld, Alina Fingerle, Katrin Knerr-Rupp, Friedrich Grässer, Hans Smola, Klaus Roemer, Elke Ebert, Yoo-Jin Kim, Rainer M Bohle, Cornelia S L Müller, Jörg Reichrath, Thomas Vogt, Magdalena Malejczyk, Sławomir Majewski, Sigrun Smola
Patients suffering from Epidermodysplasia verruciformis (EV), a rare inherited skin disease, display a particular susceptibility to persistent infection with cutaneous genus beta-human papillomavirus (beta-HPV), such as HPV type 8. They have a high risk to develop non-melanoma skin cancer at sun-exposed sites. In various models evidence is emerging that cutaneous HPV E6 proteins disturb epidermal homeostasis and support carcinogenesis, however, the underlying mechanisms are not fully understood as yet. In this study we demonstrate that microRNA-203 (miR-203), a key regulator of epidermal proliferation and differentiation, is strongly down-regulated in HPV8-positive EV-lesions...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28640508/intraglomerular-gap-junctions-enhance-interglomerular-synchrony-in-a-sparsely-connected-olfactory-bulb-network
#16
Frederic Pouille, Thomas S McTavish, Lawrence E Hunter, Diego Restrepo, Nathan E Schoppa
A dominant feature of the olfactory bulb response to odour is fast synchronized oscillations at beta (15-40 Hz) or gamma (40-90 Hz) frequencies, thought to be involved in integration of olfactory signals. Mechanistically, the bulb presents an interesting case study for understanding how beta/gamma oscillations arise. Fast oscillatory synchrony in the activity of output mitral cells (MCs) appears to result from interactions with GABAergic granule cells (GCs), yet the incidence of MC-GC connections is very low, around 4%...
June 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28639896/sgk2-promotes-hepatocellular-carcinoma-progression-and-mediates-gsk-3%C3%AE-%C3%AE-catenin-signaling-in-hcc-cells
#17
Junying Liu, Guangdong Zhang, Yanping Lv, Xiaoyang Zhang, Cui Ying, Suocheng Yang, Xin Kong, Yanzhang Yu
The phosphoinositide 3-kinase pathway is one of the most commonly altered pathways in human cancers. The serum/glucocorticoid-regulated kinase (SGK) family of serine/threonine kinases consists of three isoforms, SGK1, SGK2, and SGK3. This family of kinases is highly homologous to the AKT kinase family, sharing similar upstream activators and downstream targets. Few studies have investigated the role of SGK2 in hepatocellular carcinoma. Here, we report that SGK2 expression levels were upregulated in hepatocellular carcinoma tissues and human hepatoma cell lines compared to the adjacent normal liver tissues and a normal hepatocyte line, respectively...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28638997/follistatin-treatment-suppresses-serca1b-levels-independently-of-other-players-of-calcium-homeostasis-in-c2c12-myotubes
#18
János Fodor, Adrienn Gomba-Tóth, Tamás Oláh, János Almássy, Ernő Zádor, László Csernoch
Follistatin (FS) is a high affinity activin-binding protein, neutralizing the effects of the Transforming Growth Factor-beta (TGF-β) superfamily members, as myostatin (MSTN). Since MSTN emerged as a negative regulator, FS has been considered as a stimulator of skeletal muscle growth and differentiation. Here, we studied the effect of FS administration on the Ca(2+)-homeostasis of differentiating C2C12 skeletal muscle cells. FS-treatment increased the fusion index, the size of terminally differentiated myotubes, and transiently elevated the expression of the calcium-dependent protein phosphatase, calcineurin, at the beginning of differentiation...
June 21, 2017: Journal of Muscle Research and Cell Motility
https://www.readbyqxmd.com/read/28638863/neuroprotective-effect-of-terminalia-chebula-extracts-and-ellagic-acid-in-pc12-cells
#19
Yuh-Chiang Shen, Chi-Wen Juan, Che-San Lin, Chien-Chih Chen, Chia-Lin Chang
BACKGROUND: Alzheimer's disease (AD) is one of the common neurodegenerative disorders among elderly. The purpose of this study was to determine the neuroprotective effect and mechanisms of action underlying the Terminalia chebula extracts and ellagic acid by using beta-amyloid25-35 (Aβ25-35)-induced cell toxicity in an undifferentiated pheochromocytoma (PC12) cell line. MATERIALS AND METHODS: The T. chebula extracts were prepared using the methanol, water, and 95% ethanol...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28638279/preventive-actions-of-allergen-immunotherapy-the-facts-and-the-effects-in-search-of-evidence
#20
REVIEW
Irene Martignago, Cristoforo Incorvaia, Erminia Ridolo
Allergen immunotherapy (AIT) is the only treatment that works on the causes of allergy. Available AIT nowadays are subcutaneous immunotherapy (SCIT) and sublingual immunotherapy (SLIT) for allergic rhinitis and asthma, while for allergy to Hymenoptera venom only subcutaneous route is recommended. A bulk of trials and meta-analyses demonstrated that efficacy and safety of AIT in decreasing allergic clinical symptoms and use of rescue medications, while its preventive capacity is yet under investigation. The most important of these effects is the prevention of potentially fatal anaphylactic reactions to Hymenoptera stings by venom immunotherapy (VIT)...
2017: Clinical and Molecular Allergy: CMA
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